.title-tab{
  height: 6rem;
  line-height: 6rem;
  padding-left: 1rem;
  position: relative;
  border:1px solid #1d5796;
  background: #0a1d55;
  color: #ffffff;
  display: inline-block;
  font-size: 3rem;
  .triangle-bottomright {
    position: absolute;
    display: block;
    bottom: -1.5rem;
    right: -1.5rem;
    height: 3rem;
    width: 3rem;
    border-left:1px solid #1d5796;
    background: #171435;
    transform:rotate(45deg);
    -ms-transform:rotate(45deg); /* Internet Explorer */
    -moz-transform:rotate(45deg); /* Firefox */
    -webkit-transform:rotate(45deg); /* Safari 和 Chrome */
    -o-transform:rotate(45deg); /* Opera */
  }
}
